I fighted very long time with the host-only connection until I did something very stupid, which doesn't make any sense to me: In the sharing tab, in os x I copled Airport not only with en2 but also with en1!!! Everything started to work... See pics: Maybe somebody can explain me the 192.168.3.x subnet in windows to me, because I've got no clue why it isn't 192.168.2.x -->>
continuation.. AND It doesn't work with os X Firewall on, unless you enable "Personal Web Sharing" good luck